PB1823: THE BONE MARROW MICROENVIRONMENT IN ACUTE MYELOID LEUKEMIA: THE ROLE OF MESENCHYMAL STEM CELLS AND THEIR IMPACT ON THE CLINICAL OUTCOME - Ludovica Calabretta; Chiara Valsecchi; Marianna Rossi; Elisa Roncoroni; Stefania Croce; Elisa Lenta; Claudia Patricia Tobar; Eleonora Gelli; Gianluca Martini; Patrizia Zappasodi; Marco Zecca; Maria Antonietta Avanzini; et al. (HemaSphere, 2023)